The first row, taken from the paper by Smith et al [1]},
shows divergence angles measured in Arabadopsis Thaliana, the
standard subject for laboratory botanical experiments. The values are averages
with standard deviations from \(8^{\circ }\)  for \(k=2\)  and increasing up to
\(20^{\circ }\) . The second row, also from [1]}, is the result of a
calculation with the SGMRKP (computer-based) model of spiral phyllotaxis. The
third and fourth rows are results of our calculations with the purely
diffusive model. \(\sigma =1/4\)  was the calculation we ran through in Section
2.4.2 but converted to degrees. Since the calculation of the previous section
showed that \(\sigma =1/3<\sigma _{0}\)  still gives spiral phyllotaxis, we
calculated the sequence of divergence angles for it also. Some observations:
